3640 & mica modems - Problems

[honeycutt]

Hello all! I am having problems with my 3640 cisco router, which has 2 mica digital modem banks in it (total 48 lines). I have an ethernet module, and a isdn module (says PRI on it) with 2 isdn inputs. My problem is that half the modems simple stop picking up for some reason. I have to check mrtg everyday to check the lines, and they are stuck at 24. Once I hard boot the router they work again. Customers call in mad because when they dialup it doesn't give a busy signal or anything, the line is just quiet.

Below is my config.

Thanks for any help!!




Current configuration:
!
version 12.0
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname cs3
!
logging buffered 4096 debugging
aaa new-model
aaa authentication login default group radius local
aaa authentication login consoleport local
aaa authentication ppp default local
aaa authentication ppp dialins if-needed group radius
aaa authorization network default group radius
aaa accounting network default start-stop group radius
enable secret 5 XXXXXXXXXXXXXXXXXXXXXXXXX
enable password 7 XXXXXXXXXXXXXXXXXXXXXXXX
!
username banks password 7 XXXXXXXXXXXXXXXXX
!
!
!
!
ip subnet-zero
no ip finger
no ip domain-lookup
!
async-bootp dns-server A.B.C.6 A.B.C.7
isdn switch-type primary-5ess
!
!
controller T1 1/0
framing esf
linecode b8zs
ds0-group 0 timeslots 1-24 type e&m-immediate-start
!
controller T1 1/1
framing esf
linecode b8zs
ds0-group 0 timeslots 1-24 type e&m-immediate-start
!
!
!
!
interface Ethernet0/0
ip address A.B.C.4 255.255.255.0
no ip directed-broadcast
half-duplex
!
interface Group-Async1
ip unnumbered Ethernet0/0
no ip directed-broadcast
encapsulation ppp
ip tcp header-compression passive
async mode interactive
peer default ip address pool setup_pool
no fair-queue
ppp authentication ms-chap pap dialins
group-range 65 88
!
interface Group-Async2
ip unnumbered Ethernet0/0
no ip directed-broadcast
encapsulation ppp
ip tcp header-compression passive
async mode interactive
peer default ip address pool setup_pool
no fair-queue
ppp authentication ms-chap pap dialins
group-range 97 120
!
ip local pool setup_pool A.B.C.104 A.B.C.151
ip classless
ip route 0.0.0.0 0.0.0.0 A.B.C.1
no ip http server
!
logging trap debugging
dialer-list 1 protocol ip permit
snmp-server engineID local 00000009020000D0BA49E1C1
snmp-server community XXXXX RO
snmp-server community XXXXX RW
radius-server host A.B.C.6 auth-port 1812 acct-port 1813
radius-server host A.B.C.6 auth-port 1645 acct-port 1646
radius-server host A.B.C.7 auth-port 1645 acct-port 1646
radius-server host A.B.C.7 auth-port 1812 acct-port 1813
radius-server deadtime 5
radius-server key XXXXXXXXXXXXXXX
radius-server vsa send accounting
radius-server vsa send authentication
!
line con 0
transport input none
line 65 88
autoselect during-login
autoselect ppp
modem InOut
modem autoconfigure type mica
transport input all
line 97 120
autoselect during-login
autoselect ppp
modem InOut
modem autoconfigure type mica
transport input all
line aux 0
line vty 0 4
password 7 XXXXXXXXXXXXXXXXXXXXX
login authentication consoleport
!
end

 

[computerhighguy]

I used to have the Mica modems on my 3640. We had big issues with kind of the same thing (we had 30 of them). Some would go dead or just stop functioning. I spent MANY hours on the phone with Cisco trying to figure out why. The 3640 platform does not have the robustness of the AS5xxx series. It really is a poor choice for network access in my opinion. I would upgrade the modems to the latest firmware and see how they work. I also had to add a modem cap to my configuration to try and get it work correctly.

By the way, you have a T-1 and not a PRI. I prefer PRIs since I find the D channel easier to troubleshoot and you can get the 56K dialup speeds. Regular T-1s don't give you that much.

We ended up upgrading to an AS5350 so that we can terminate Voice and Data calls on the same system. It rocks!!! If money is an issue, I would look for a used AS5300 on ebay. You should be able to pick one up pretty cheap.




It is what it is!!
__________________________________
A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)

 

[honeycutt]

Our sprint phone bill says "IDSN - PRI contract term". Could this setup be wrong, and we really have a PRI line? This config was done before I got here, so i'm trying to sort all this out. Let me know what you think! Thanks!

 

[computerhighguy]

If it was a PRI you would have something like this.

controller T1 1/0
framing esf
linecode b8zs
pri-group timeslots 1-24





It is what it is!!
__________________________________
A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)

 

[honeycutt]

Also whenever I try to upgrade the IOS the system light always comes on green. With my old IOS version the system light never came on at all. Does this mean something is wrong? If so how do you debug to see why the system light is on? -- Thanks!

 

[honeycutt]

Nevermind on the light thing. I found out that it means the system is just fine. Wonder why it doesn't even come on with the IOS I use now... Also when I ugraded IOS it would only find 10 timeslots on each T1 line. It will find all 24 with the IOS I use now (12.0). Anyone else ran into this issue?